Method of making ball-cone elements



y B. G. NICE METHOD OF MAKING BALL CONE ELEMENTS Filed Jan. 18. 1923 F/GJ.

Ii i Win ` Buda/G. /Vfce auf W/T/VESS:

Patented May 3l, 1927,

UNrra BUDD G. NISE, 0F GONTZ, PENNSYLVANA, ASSIGNOR T0 ARTHUR N. GOODFELLOW,

'0F IPHILADELPHIA, EENNSYLVl-'LNIA, TRUSTEE.

METHD GF MAKING BALL-GONE ELEMENTS.

Application 'filed January 18, 1923. Serial No. 613,489.

rllhe product of the method of this invention is a ball-cone element consisting of a body portion of flaring tubular form provided at its flaring end with a flat flange and at its other end with a cylindrical flange right-angularly disposed in respect to the flat flange.

rThe principal .object of the present invention is to provide a simple, expeditious and comparatively inexpensive method of making such ball-cone elements from sheet metal stock and, generally stated, the method consists in producing from -such stock' metal blanks of flat ring form and then enlarging the hole in the blank and drawing and stretching and bending the metal adjacent Vto the hole in respect to the flat metal remote from the hole and disposed at the outer rim of the blank by the application of pressure to the face of the blank.

rl`he invention also comprises the improvev ments to' be presently described and finally claimed.

ln the description reference will be made to the accompanying drawing forming part hereof and in which f Figure 1 is a cross-sectional view of a ball bearing fitted with a ball-cone element which is the product of the method of the present invention. y l

Fig. 2 is an elevational view of the 'ballcone element.

Fig. 3 is a top or plan view illustrative of the manufacture of the/metal blanks of Hat ring form from `sheet metal stock.

Fig. 4 is an elevational view, princi ally in cross-section, further illustrative o the manufacture of the fiat ring blanks, and

' Figs. 5 and 6 are elevational views, 'principally in cross-section, illustrating the manufacture of a ring blank into a ball-cone by the method of the present invention.

- The ball-cone consists of a body portion 1- of tubular flaring form provided at its flaring end with a fiat flange 2 and at its other` end with a cylindrical flange 3 disposed right-angularly in respect to the flange 2. A sheet of flat metal 4 of a propriate thickness and width is the stock om which metal blanks of fiat ring form 5, Fig. 5, are produced. One way of doing this isto feed the stocker sheet 4 from right toleft through a punch and die mechamsm of which parts are indicated in Fig. 4. The piercing punch 6 in co-operation with the die 7 r removes a circular slug from the sheet 4 and the opening thus formedis `the hole 8 at the center of the blank of ring form and is also use-- tion. The hole 8 vin the blank of flat ring form 5 is enlarged and the metal adjacent l to the hole 8 is drawn, stretched, bent and displaced laterally in respect to the fiat metal remote from the rim ofthe hole,'thus producing the ball-cone element already described. Referring to Figs. 5 and 6 for a further description of the method of theV invention, the blank of fiatring form is supported at its outer margin 2 on the rim of a flaringopening in the die 11, and the blunt point 12 of the forming punch 13 enters the hole 8 and the flat end of the body of the punch 13 applies pressurel to the flat face of the blank and forcesthe center of the blank downward, draws lthe metal around the 'curved surface of the opening in the die, and forces the hole open, stretching the fmetal, and bends the center edge of the blank into the flange 3. The metal of the blank surrounding the hole flows ahead of the end of the bo y of the ITpunch. Finishing the downward stroke the punch 'holder 14 strikes the top surface of the spring retracted flattening punch 15 and causes it to strike the top surface of the blank and flatten it to size. On the u stroke -the part 15 strips the finished pro uct from the part 13. The product of the method may be placed in a revolving gas carburizing furnace and gradually brought to the necessary temperature for case hardening. The heated product can then be removed and quenched in water andthereafter sand-blasted to remove surface scale formed during the heat treatment. Of course other meansl than a revolvingy lgas -carburizin'g furnace may be em 'ployed for heating the product.

From the foregoing description and upon reference to the drawings it is evident that the blank is unconined at the outer part 1 when the pressure makes the tubular part, and that` the tubular part is confined when the continued pressure is applied to the outer rim to Hatten it, as n Fig. 6.

It will be obvious to those skilled in the art laterally out of the plane of the outer rim parts and into flaring tubular and cylindrical form by pressure applied to the portion of the face of the blank which lies between the rim of the hole and the margin of the blank While the outer part of the blank is unconfined, and then flattening the previouslyT unconfined outer rim portion of the blank by continued pressure applied in the same direction While the Haring tubular part is confined.

BUDD G. NICE. 

